<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./js/vue.js"></script>
</head>
<body>
    <div id="app">
        <input type="text" v-model="msg">
        {{msg|upperCase|asterisk}}
    </div>
    <div id="app2">
        <input type="text" v-model="msg">
        {{msg|upperCase|asterisk}}
    </div>
    <script>
        const vm=new Vue({
        el:'#app',
        data:{
            msg:''
         },
         filters: {
            upperCase:function(val){
                return val.toUpperCase();
            },
            asterisk:function(val){
                var reg=/\d/g;
                return val.replace(reg,'*');
            }
         }
        })

        const vm2=new Vue({
        el:'#app2',
        data:{
            msg:''
         }
        })
    </script>
</body>
</html>